Door stop



"Dec. 20, 1960 T. H. BLANKENSH'IP 2,964,780

i DOOR STOP Filed July 24, 1957 INVENTm THOMAS H.BLANKENSH-IP ATTORNEYS United States Patent DOOR STOP Thomas H. Blankenship, Detroit, Mich. (R.R. l, Grayling, Mich.)

Filed July 24, 1957, Ser. No. 673,779

2 Claims. (Cl. 16-82) My invention relates to a new and useful improvement in a door stop adapted for mounting on swingable doors and operative to engage the wall of a room as the door approaches the fully opened position to prevent slamming of the door knob against the wall.

It is an object of the present invention to provide a door stop or butter so arranged and constructed that when the door is closed, the stop will move to inoperative position so as to extend parallel to the door and which will, upon opening of the door, drop downwardly into a horizontal operative position parallel with the floor so as to contact the wall when the door is swung to the fully opened position.

Another object of the invention is the provision of a door stop of this class which will be simple of construction, economical of manufacture, durable, compact, and highly etficient in use.

Other objects will appear hereinafter.

It is recognized that various modifications and changes may be made in the detail of the structure illustrated without departing from the invention, and it is intended that the present disclosure shall be considered to be but the preferred embodiment.

Forming a part of this application are drawings, in which:

Fig. 1 is a perspective viewof the invention mounted on a door shown in fragment;

Fig. 2 is a front elevational view of the invention showing the door in closed position;

Fig. 3 is a perspective view illustrating a wear plate mounted on a door jamb;

Fig. 4 is a sectional view taken on the line 4-4 of Fig. 2;

Fig. 5 is a perspective view of a modified form of an arm which may be used with the invention.

In the drawings, I have shown a swingable door 7, and I have also illustrated the door jamb 8, on which is mounted a wear plate 9. A metallic plate is mounted on the plate 11 which is attached to the face of the door 7. Projecting outwardly from the central portion of the plate 10 are flanges 12 and 13 which provide a channel 14 in which may engage the stop arm 15. Secured to the stop arm 15 is a rod 16 having the angularly turned portion 17 journalled in a knuckle 18 formed on the plate 10. This angularly turned portion 17 is again angularly turned and curved to provide the cam engagement member 19. Mounted on the end of the arm 15 is a head formed from rubber or other yieldable material.

The construction is such that when the door is moved to closed position, the cam 19 will engage the wear plate 9 so as to rock the member 17 and swing the arm 15 upwardly from the horizontal position shown in Fig. 1' to the position shown in Fig. 2. When swung upwardly, this arm 15 will lie in the channel 14 and the flanges 12 2,964,780 Patented Dec. 20, 1960 ice and 13 will protect the arm 15 against lateral thrusts or blows which might be delivered thereon. When the door is swung toward open position the arm 15 will swing downwardly to a horizontal position immediately upon the door being swung suflicient to disengage the member 19 from the wear plate 9.

In this way, I have provided a door stop or bufier which, upon closing the door, automatically moves into place so that it does not project outwardly from the door but extends parallel thereto. At the same time, I have provided a structure which is quite durable and experience has shown that the likelihood of damaging the structure by blows delivered laterally to the arm 15 is reduced to a minimum.

In Fig. 5, I have shown a slight modification of the arm. The arm 15a corresponds to the arm 15 and is provided with the yieldable head 20a. The angularly turned portion 17a carries the cam extension 19a on which is mounted a flexible roller 21 made from rubber or the like. With this type of construction, the wear plate 9 may be eliminated.

What I claim is:

l. A door stop of the class described adapted for mounting on a swingable door associated with a stationary door jamb, comprising: an elongated plate mounted on the inner face surface of said door with the longitudinal axis disposed vertically; a pair of spaced apart flanges projecting outwardly from said plate and at a point inwardly of the opposite side edges; a stop arm swingably mounted on said plate and swingable to an inoperative position between said flanges, and, upon swinging of said door toward open position, movable downwardly by gravity to a horizontal operative position for engagement with the wall when the door is fully opened; and, a rockable cam arm carried by said stop arm and engageable with the door jamb, upon the closing of said door, for swinging said stop arm upwardly into the inoperative position between said flanges.

2. A door stop of the class described adapted for mounting on a swingable door associated with a stationary door jamb, comprising: an elongated plate mounted on the inner face surface of said door with the longitudinal axis disposed vertically; a pair of spaced apart flanges projecting outwardly from said plate and at a point inwardly from the opposite side edges thereof; a knuckle formed on the lower end of said plate below said flanges; a stop arm having a right angularly turned portion on the lower end thereof rotatably journalled in said knuckle whereby said stop arm is swingable between a horizontal operative position and an inoperative position between said flanges, said stop arm, upon swinging of said door toward the open position, being movable downwardly by gravity to said horizontal operative position for engagement with the wall when the door is fully opened; and, a curved cam arm formed on the outer end of said angularly turned portion, at right angles thereto and engageable, upon closing of said door, with the door jamb for swinging said stop arm upwardly into the inoperative position between said flanges.

References Cited in the tile 01 this patent UNITED STATES PATENTS 788,626 Bohne May 2, 1905 1,4l5,493 Strayer May 9. 1922 1,656,394 Sasgen -4 Jan. 17, 1928 2,178,718 Christensen Nov. 7, 1939 2,339,073 l-lobson et al. Jan. ll, 1944 2,704,220 Graham Mar. 15, 1955 

